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/**
* Dynamically Loaded Engine
* (C) 2010 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/dyn_engine.h>
#include <botan/internal/dyn_load.h>
namespace Botan {
namespace {
extern "C" {
typedef Engine* (*creator_func)(void);
typedef u32bit (*module_version_func)(void);
}
}
Dynamically_Loaded_Engine::Dynamically_Loaded_Engine(
const std::string& library_path) :
engine(0)
{
lib = new Dynamically_Loaded_Library(library_path);
try
{
module_version_func get_version =
lib->resolve<module_version_func>("module_version");
const u32bit mod_version = get_version();
if(mod_version != 20101003)
throw std::runtime_error("Incompatible version in " +
library_path + " of " +
to_string(mod_version));
creator_func creator =
lib->resolve<creator_func>("create_engine");
engine = creator();
if(!engine)
throw std::runtime_error("Creator function in " +
library_path + " failed");
}
catch(...)
{
delete lib;
lib = 0;
throw;
}
}
Dynamically_Loaded_Engine::~Dynamically_Loaded_Engine()
{
delete engine;
delete lib;
}
}
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